The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 31, 2011
Filed:
Jan. 20, 2007
Peter Gutmann, München, DE;
Jin Hong LI, München, DE;
Peter Gutmann, München, DE;
Jin Hong Li, München, DE;
Sona BLW Prazisionsschmiede GmbH, Munich, DE;
Abstract
In the toothing system () of a gearwheel having a plurality of teeth () whose tooth flanks () have involute form above a tooth-root region () of the tooth flanks (), the tooth-root region () of the tooth flanks () that, as viewed in normal section, extends between a root useful point () and a root point (F) has elliptical shape, tangentially adjoins the involute region of the tooth flank () at the root useful point () and tangentially contacts the root circle (FKS) at the root point (F). In its tooth-root region (), the tooth flank (), as viewed in normal section, substantially follows a partial section (B) of an ellipse (; E) whose semiaxes (a, b) have different lengths, one semiaxis (a, b) of the ellipse (; E) being inclined at an ellipse tilting angle alpha larger than 0° and smaller than 90° relative to a radial (R) through the root point (F). Furthermore, the tooth flanks () of the teeth () of the toothing are symmetric to one another across a symmetry plane (A) that divides the respective tooth () in axial direction.